import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login', '/register', '/password_reset'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
    // start progress bar
    NProgress.start()

    // set page title
    document.title = getPageTitle(to.meta.title)

    // determine whether the user has logged in
    // TODO: 是否校验token
    const hasToken = getToken()
    // const hasToken = true

    // 权限验证代码
    if (hasToken) {
        if (to.path === '/login') {
            // if is logged in, redirect to the home page
            next({ path: '/' })
            NProgress.done()
        } else {
            // 判断role是否存在且合法
            if (store.getters.role >= 0) {
                next()
            } else {
                // 当前用户未拉取user_info信息
                try {
                    // 获取全局用户信息
                    const { role } = await store.dispatch('user/getInfo')

                    // 基于权限生成路由表
                    const accessRoutes = await store.dispatch('permission/generateRoutes', role)

                    // 动态添加路由
                    router.addRoutes(accessRoutes)

                    // 确保路由挂载完成后在跳转, 不会使得next失效
                    next({ ...to, replace: true })
                } catch (error) {
                    // remove token and go to login page to re-login
                    await store.dispatch('user/resetToken')
                    Message.error(error || 'Has Error')
                    next(`/login?redirect=${to.path}`)
                    NProgress.done()
                }
            }
        }
    } else {
    /* has no token*/

        if (whiteList.indexOf(to.path) !== -1) {
            // in the free login whitelist, go directly
            next()
        } else {
            // next() // TODO: 是否开启拦截
            // other pages that do not have permission to access are redirected to the login page.
            next(`/login?redirect=${to.path}`)
            NProgress.done()
        }
    }
})

router.afterEach(() => {
    // finish progress bar
    NProgress.done()
})
